Moving cart system

ABSTRACT

The present invention features, in part, a moving cart system that comprises a moving cart main line which is disposed along process portions and on which a moving cart is transpired along a positive length direction of the moving cart main line, a moving cart return line which is disposed parallel with the moving cart main line and on which the moving cart is transpired along a negative length direction of the moving cart return line, traverses which are disposed for connecting a front and a rear of the moving cart main line and the moving cart return line, and a plurality of storages which are disposed perpendicular to the moving cart return line in predetermined intervals along a length direction of the moving cart return line for storing the moving cart, wherein the moving cart moves along the plurality of storages.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and the benefit of Korean Patent Application No. 10-2008-0082893 filed in the Korean Intellectual Property Office on Aug. 25, 2008, the entire contents of which are incorporated herein by reference.

BACKGROUND OF THE INVENTION

(a) Field of the Invention

In general, the present invention relates to a moving cart system. More particularly, the present invention relates to a moving cart system on which a moving cart can be suitably transported and stored.

(b) Description of the Related Art

In the vehicle body manufacturing process, a welding process is important and a moving cart system is necessary to realize factory automation for the welding process.

Recently, the moving cart system has been developed into a circulation system for mixing the production of many kinds of vehicles.

In one example, a conventional moving cart system, for example as shown in FIG. 9, is provided with a process line 11 on a bottom process floor where a number of welding robots (not shown) work.

Preferably, a moving shuttle 13 is suitably disposed on the process line 11 for a moving cart 3 loaded with a part element 1 to be transported to a robot welding process section.

Preferably, a moving cart return line 17 is disposed to an upper deck 15 of an upper floor.

Preferably, a table lifter 19 is disposed between rearwards of the moving shuttle 13 and the upper deck 15, and the lifter 19 transports the moving carts 3 from the process line 11 on a bottom process floor to the upper deck 15 of an upper floor.

Preferably, a traverse 21 is disposed to the rearward of the upper deck 15 to be connected to the moving cart return line 17.

The traverse 21 transports the moving cart 3 transported from the process line 11 by the table lifter 19 to the moving cart return line 17.

Preferably, a multi moving cart storage 31 is disposed to forward of the process line 11 and the moving cart return line 17, and the multi moving cart storage 31 loads the moving cart 3 transported by the moving cart return line 17 and suitably supplies the moving cart 3 to the process line 11.

The multi moving cart storage 31 has a space for loading the moving carts 31 and multi moving cart storage 31 may have second or third floor.

The moving carts 3 may move up and down or from side to side as a puzzle type in the multi moving cart storage 31, and can be transported to the process line 11.

However, the conventional moving cart system requires multi floors, the table lifter 19, the side to side multi moving cart storage 31, so that the conventional moving cart system is complicated in scheme and increased in size.

Also, the puzzle type, side to side, multi moving cart storage 31 of the conventional moving cart system is complicated in scheme for supplying and storing the moving cart 3 and requires sufficient interval for supplying and storing the moving cart 3.

The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.

SUMMARY OF THE INVENTION

The present invention provides a moving cart system which is suitably configured on one floor for supplying and storing a moving cart without a lifter, multi floors and multi moving cart storages.

Preferably, a moving cart system according to an exemplary embodiment of the present invention may include a moving cart main line which is suitably disposed along process portions and on which a moving cart is transpired along a positive length direction of the moving cart main line, a moving cart return line which is suitably disposed parallel with the moving cart main line and on which the moving cart is preferably transpired along a negative length direction of the moving cart return line, traverses which are disposed for connecting a front and a rear of the moving cart main line and the moving cart return line and a plurality of storages which are suitably disposed perpendicular to the moving cart return line in predetermined intervals along length direction of the moving cart return line for storing the moving cart, wherein the moving cart may moves along the plurality of storages.

In preferred embodiments of the invention, the moving cart main line may preferably be divided to end sections which is a front and a rear portion of the moving cart main line and a middle section between the end sections. The moving cart main line may suitably include a first base frame disposed along the process portions, process rails disposed both sides of the first base farm and a shuttle plate suitably disposed between the process rails of the middle section.

In preferred embodiments, the moving cart system may further include a shuttle driving unit which is disposed to the middle section of the moving cart main line.

Preferably, the shuttle driving unit may include a mounting frame suitably disposed to the first base frame, a first drive motor suitably disposed to the mounting frame, a pinion which is connected with the first drive motor and is suitably engaged with a rack disposed under the shuttle plate and a plurality of guide rollers which are suitably disposed to the mounting frame through a mounting bracket and guides forward and rearward movement of the shuttle plate.

Preferably, the moving cart system may further include a hooking unit which is suitably disposed to the shuttle plate and controlling movement of the moving cart.

Preferably, the hooking unit may include a hooking cylinder disposed to the shuttle plate, a hooking pin disposed to an end of a driving rod of the hooking cylinder and a hydraulic supplier supplies hydraulic pressure to the hooking cylinder.

In preferred embodiments of the present invention, the moving cart system may further include a cart positioning unit, which is preferably disposed to the moving cart main line corresponding to the traverses, and preferably disposed to the moving cart return line corresponding to each cart storage, and wherein the cart positioning unit arranges positions of the moving cart, a first stopping unit which is suitably mounted to the moving cart main line and limits movement of the moving cart along positive length direction of the moving cart main line, a second stopping unit which is suitably mounted to the moving cart main line, and correspond to the traverses, and limits movement of the moving cart along length direction of the traverses and a third stopping unit which is suitably mounted to the moving cart return line correspond to each storage and limits movement of the moving cart along length direction of the moving cart return line. Preferably, the moving cart system may further include a first moving unit which is suitably disposed to the end sections of the moving cart main line and is connected with each of the traverses for the moving cart to be transported along length direction of the traverses.

In other preferred embodiments, the first moving unit may include a pair of first mounting plates that are suitably disposed, corresponding to the traverse, at least one the first rollers disposed to the first mounting plate, and preferably to be suitably rotated to the length direction of the traverse, a first guide rail suitably disposed on the first mounting plate, a second drive motor suitably disposed to the first base frame, a first decelerator suitably disposed to the first base frame and connected to the second drive motor, a first power delivery shaft suitably connecting the first decelerator and the first roller and a plurality of the first elevating cylinders suitably disposed to the first base frame correspond to the first mounting plate and including a driving rod connected to the first mounting plate.

Preferably, the moving cart system may further include a return rail that is suitably disposed to a second base frame configured to the moving cart return line and second moving units suitably disposed along the moving cart return line for the moving cart to be transported along the moving cart return line.

In related embodiments, the second moving unit may preferably include a third drive motor suitably disposed to the second base frame, a plurality of the first gear boxes arranged along the second base frame, a second roller suitably disposed to an end of the first gear box for rotating to the length direction of the moving cart return line, and a second power delivery shaft connecting the third drive motor and the first gear boxes.

Preferably, the moving cart system may further include a third moving unit that is suitably disposed to the moving cart return line to be connected with the storage for the moving cart to be transported along the length direction of the moving cart return line; and a fourth moving unit that is suitably disposed to the storage for the moving cart to be transported along the storage.

Preferably, the third moving unit may include a pair of the second mounting plate disposed to the moving cart return line correspond to each storage, at least one the third roller suitably disposed on the second mounting plate for rotating along the storage direction, a second guide rail suitably disposed to the second mounting plate correspond to the storage, a second gear box mounted to the second base frame, a third power delivery shaft connecting the second gear box and the third roller and a second elevating cylinder disposed on the second base frame and including a driving rod connected to the second mounting plate.

Preferably, the storage may further include a third guide rail which is suitably disposed to a third base frame configure to the storage for the moving cart to be transported along the storage, wherein the fourth moving unit may include a fourth drive motor mounted to the third base frame, a third gear box disposed to the third base frame, a fourth roller disposed for rotating along the storage length direction and a fourth power delivery shaft connecting the fourth drive motor, the third gear box and the second gear box.

Preferably, the front traverse may further include a third guide rail for the moving cart to be transported from a front side of the moving cart return line to a front side of the moving cart main line.

Preferably, the third guide rail may be disposed both side of a fourth base frame configured to the front traverse.

Preferably, the rear traverse may further include a fourth guide rail for the moving cart to be transported from a rear side of the moving cart main line to a rear side of the moving cart return line,

Preferably, the fourth guide rail may be disposed both side of a fifth base frame configured to the rear traverse.

Preferably, the moving cart system may further include a fifth moving unit which is suitably disposed to the traverse for the moving cart to be transported along the traverse.

Preferably, the fifth moving unit may include a fifth drive motor suitably mounted to the fourth and the fifth base frame, a second decelerator suitably disposed to the fourth and the fifth base frame and connected to the fifth drive motor, a fourth gear box suitably connected to the second decelerator, a fifth roller suitably disposed to the fourth gear box for rotating along length direction of the traverse and a fifth power delivery shaft suitably connecting the second decelerator and the fourth gear box.

As described above, the moving cart system according to an exemplary embodiments of the present invention may preferably be configured on one floor for supplying and storing a moving cart without a lifter, multi floors and multi moving cart storages.

Preferably, according exemplary embodiments, moving cart systems can be simple in scheme and reduced in size, accordingly reduced in investment in plant manufacturing and equipment.

Further, the moving cart system according to preferred exemplary embodiments of the present invention may reduce the interval for supplying and storing a moving cart so that the rate of operation can be suitably increased.

It is understood that the term “vehicle” or “vehicular” or other similar term as used herein is inclusive of motor vehicles in general such as passenger automobiles including sports utility vehicles (SUV), buses, trucks, various commercial vehicles, watercraft including a variety of boats and ships, aircraft, and the like, and includes hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles and other alternative fuel vehicles (e.g. fuels derived from resources other than petroleum).

As referred to herein, a hybrid vehicle is a vehicle that has two or more sources of power, for example both gasoline-powered and electric-powered.

The above features and advantages of the present invention will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated in and form a part of this specification, and the following Detailed Description, which together serve to explain by way of example the principles of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is/are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.

FIG. 1 is a drawing showing an exemplary layout of a moving cart system according to a preferred embodiment of the present invention.

FIG. 2A to FIG. 2C are drawings showing an exemplary shuttle driving unit of the moving cart system according to a preferred embodiment of the present invention.

FIG. 3 is a drawing showing an exemplary hooking unit of the moving cart system according to another preferred embodiment of the present invention.

FIG. 4 and FIG. 5 are drawings showing an exemplary moving cart main line of the moving cart system according to a preferred embodiment of the present invention.

FIG. 6 is a drawing showing an exemplary moving cart return line and a storage of the moving cart system according to another preferred embodiment of the present invention.

FIG. 7 is a drawing showing a third and fourth moving unit of the moving cart system according to an exemplary embodiment of the present invention.

FIG. 8 is a drawing showing a traverse of the moving cart system according to an exemplary embodiment of the present invention.

FIG. 9 is a drawing showing layout of an exemplary conventional moving cart system.

<Description of Reference Numerals Indicating Primary Elements in the Drawings> 100: moving cart system 110: moving cart main line 111: end section 113: middle section 115: first base frame 117: process rail 119: shuttle plate 120: shuttle driving unit 121: mounting frame 123: first drive motor 124: coupler 125: pinion 126: rack 127: guide roller 128: mounting bracket 130: hooking unit 131: hooking cylinder 132: driving rod 133: hooking pin 140: first cart positioning unit 150: first stopping unit 160: second stopping unit 161: stopper 170: first moving unit 171: first mounting plate 173: first roller 175: first guide rail 177: second drive motor 179: first decelerator 181: first power delivery shaft 183: first elevating cylinder 210: moving cart return line 211: second base frame 213: return rail 220: second cart positioning unit 230: third stopping unit 231: stopper 240: second moving unit 241: third drive motor 243: first gear box 245: second roller 247: second power delivery shaft 250: third moving unit 251: second mounting plate 253: third roller 255: second guide rail 257: second gear box 259: third power delivery shaft 261: second elevating cylinder 310: first traverse 311: fourth base frame 313: third guide rail 320: second traverse 321: fifth base frame 323: fourth guide rail 350: fifth moving unit 351: fifth drive motor 353: second decelerator 355: fourth gear box 357: fifth roller 359: fifth power delivery shaft 410: storage 411: third base frame 413: third guide rail 420: fourth moving unit 421: fourth drive motor 423: third gear box 425: fourth roller 427: fourth power delivery shaft

DETAILED DESCRIPTION OF THE EMBODIMENTS

In one aspect, the present invention features a moving cart system comprising a moving cart main line, a moving cart return line, traverses, and, a plurality of storages.

In one embodiment, the moving cart main line is disposed along process portions.

In another embodiment, the moving cart is transpired along a positive length direction of the moving cart main line.

In a related embodiment, the moving cart return line is disposed parallel with the moving cart main line.

In one embodiment, the moving cart is transpired along a negative length direction of the moving cart return line.

In another embodiment, the traverses are disposed for connecting a front and a rear of the moving cart main line and the moving cart return line.

In a related embodiment, the plurality of storages are disposed perpendicular to the moving cart return line.

In one embodiment, the plurality of storages are disposed in predetermined intervals along the length direction of the moving cart return line for storing the moving cart.

In another embodiment, the moving cart moves along the plurality of storages.

The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

FIG. 1 is a drawing showing layout of a moving cart system according to an exemplary embodiment of the present invention.

In a preferred embodiment of the present invention, for example referring to the drawing of FIG. 1, an exemplary moving cart system 100 according to a preferred embodiment of the present invention is suitably applied to a mixing production of many different kinds of vehicle systems, which assemblies assembly panels (side assembly panels) in one line by a suitable welding process.

Preferably, the side assembly panels are assembled panels made of part elements 1 such as outer panels, inner panels, supporting panels and so on, by welding process.

In further embodiments, the moving cart system 100 preferably includes a moving cart 3 for suitably transporting the part elements 1 to process portions 511.

In preferred embodiments, in the process portions 511, welding robots (not shown) do spot welding of the part elements.

Preferably, the moving cart system 100 suitably includes a moving cart main line 110, a moving cart return line 210, traverses 310 and 320 and storages 410.

According to certain preferred embodiments, for example as shown in the drawing, direction from forward to rearward of the moving cart main line 110 will preferably be defined as X(+) and the opposite direction will preferably be defined as X(−). According to further related embodiments, direction from forward of the moving cart return line 210 to forward of the moving cart main line 110 will preferably be defined as Y(+) and the opposite direction will preferably be defined as Y(−).

According to other preferred embodiments, the moving cart main line 110 is suitably disposed along the X (+) direction and the moving cart return line 210 is suitably disposed along X (−) direction parallel with the moving cart main line 110.

Preferably, the traverses 310 and 320 respectively suitably connect the forward and rearward of the moving cart main line 110 and the moving cart return line 210, and in exemplary preferred embodiments and hereinafter the forward traverse 310 will be suitably indicated as a first traverse and the rearward traverse 320 will be suitably indicated as a second traverse.

Preferably, the first traverse 310 and the second traverse 320 are suitably disposed along the Y direction.

Further, the storages 410 are connected moving cart return line 210 and suitably disposed along the Y direction.

In certain preferred embodiments, the moving cart main line 110 preferably functions as a main shuttle line for transporting moving cart 3 along the X (+) direction

In other certain preferred embodiments, the moving cart main line 110 is suitably divided to end sections 111 which is a front and a rear portion of the moving cart main line 110 and a middle section 113 between the end sections 111.

In further preferred embodiments, the moving cart main line 110, for example referring to FIG. 2A, preferably includes a first base frame 115, a process rail 117 and a shuttle plate 119.

Preferably, the first base frame 115 is suitably disposed to the X direction along the process portions 511.

Preferably, the process rail 117 for transporting the moving cart 3 is suitably disposed to the first base frame 115 along the X direction.

Preferably, the shuttle plate 119 for transporting the moving cart 3 along the X (+) direction is suitably disposed between the process rails 117 of the middle section 113 and is movable along the first base frame 115.

According to further preferred embodiments, a shuttle driving unit 120, as shown in FIG. 2A to FIG. 2C, is suitably disposed to the middle section 113 of the moving cart main line 110 for supplying driving torque to the shuttle plate 119.

Preferably, the shuttle driving unit 120 suitably includes a mounting frame 121, a first drive motor 123, a pinion 125 and a plurality of guide rollers 127.

Preferably, the mounting frame 121 is disposed to the first base frame 115 and the first drive motor 123 is mounted to mounting frame 121.

Preferably, the pinion 125 is suitably connected to the first drive motor 123 and engaged with a rack 126 formed under the shuttle plate 119.

Preferably, the guide rollers 127 are suitably positioned both ends of the shuttle plate 119 and the guide rollers 127 are disposed to the mounting frame 121 by a mounting bracket 128.

Preferably, the guide rollers 127 guide forward and rearward movement of the shuttle plate 119.

According to further embodiments, a drive shaft (not shown) of the first drive motor 123 is suitably connected to a coupler 124 and rotatably supported by the mounting bracket 128, and the pinion 125 is suitably disposed to drive shaft.

Further, in other preferred embodiments, a hooking unit 130, as shown in FIG. 3, is suitably disposed to the shuttle plate 119 for hooking the moving cart 3 and transporting the moving cart 3 with the shuttle plate 119.

Preferably, the hooking unit 130 includes a hooking cylinder 131, a hooking pin 133 and a pair of hydraulic supplier L1 and L2.

Preferably, the hooking cylinder 131 is suitably mounted to on the shuttle plate 119 and a driving rod 132, operated by the hydraulic supplier L1 and L2, is suitably disposed to the hooking cylinder 131.

In preferred embodiments, the hooking pin 133 is suitably configured to an end of the driving rod 132 of the hooking cylinder 131.

In preferred embodiments, the hydraulic supplier L1 and L2 are suitably connected to supplying cylinders C1 and C2 for supplying operating hydraulic pressure to the hooking cylinder 131.

A hooking unit 130 according to exemplary embodiments of the invention is described in Korea application No. 2007-0115523, incorporated by reference in its entirety herein.

In certain preferred embodiments, a first cart positioning unit 140, for example as shown in FIG. 4, is suitably disposed to the moving cart main line 110 for arranging positions of the moving cart 3.

Preferably, the first cart positioning unit 140 is suitably disposed to the end section 111 corresponding to each first and the second traverse 310 and 320.

Preferably, the first cart positioning unit 140 may suitably arrange position of the moving cart 3 along the X and Y direction at the same time on the process rail 117 of the moving cart main line 110.

Preferably, the first cart positioning unit 140 variably clamps a positioning protrude 5 formed under the moving cart 3 by suitable operation of operating cylinder.

A first cart positioning unit 140 according to exemplary embodiments of the invention is described in Korean application No. 2008-0029864, incorporated by reference in its entirety herein.

Preferably, a first stopping unit 150, as shown in FIG. 5, is suitably disposed to the moving cart main line 110 and the first stopping unit 150 selectively limits movement to the X(+) direction of the moving cart 3.

Preferably, the first stopping units 150 are suitably disposed to the first base frame 115 of the moving cart main line 110 at regular intervals.

Preferably, the first stopping unit 150 may clamp the moving cart 3 by operation of operating cylinder.

in certain exemplary embodiments, a second stopping unit 160, for example as shown in FIG. 4, is suitably disposed to the moving cart main line 110.

In related embodiments, the second stopping unit 160 may suitably limit movement to the Y direction of the moving cart 3 transported from the first traverse 310 to moving cart main line 110 and may limit movement to the Y direction of the moving cart 3 transported from moving cart main line 110 to the second traverse 320 (referring to FIG. 1).

Preferably, the second stopping unit 160 is suitably disposed to the end section 111 of the moving cart main line 110 corresponding to each first and the second traverse 310 and 320.

In certain exemplary embodiments, the second stopping unit 160 is preferably mounted to the first base frame 115 of the moving cart main line 110 and includes a stopper 161 for limiting movement to the Y(+) direction of the moving cart 3 by operation of operating cylinders.

According to certain preferred embodiments of the invention, a first moving unit 170, for example as shown in FIG. 4, is suitably disposed for transporting the moving cart 3 from the first traverse 310 to the moving cart main line 110 and for transporting the moving cart 3 from the moving cart main line 110 to the second traverse 310.

Preferably, the first moving unit 170 are suitably disposed to each end section 111 of the moving cart main line 110 and connected with the first and the second traverse 310 and 320 respectively.

In certain exemplary embodiments of the present invention, the first moving unit 170 includes a pair of the first mounting plate 171, a first roller 173, a first guide rail 175, a second drive motor 177, a first decelerator 179, a first power delivery shaft 181 and a first elevating cylinders 183.

In preferred embodiments, the first mounting plates 171 are suitably disposed between the process rail 117 of the moving cart main line 110 and preferably correspond to the first and the second traverse 310 and 320.

Preferably, the first roller 173 is suitably disposed on the first mounting plate 171 rotatable to the Y direction.

Preferably, the first guide rail 175 is suitably disposed corresponding to the traverses 310 and 320 along the Y direction.

Preferably, the second drive motor 177 is suitably mounted on the first base frame 115, and the first decelerator 179 is suitably disposed to the first base frame 115 and connected to the second drive motor 177.

Preferably, the first power delivery shaft 181 is suitably connected to the first decelerator 179 and the first roller 173.

Preferably, the first power delivery shaft 181 suitably receives driving torque of the second drive motor 177 through the first decelerator 179 and suitably supplies such to the first roller 173.

According to certain exemplary embodiments of the present invention, the first elevating cylinders 183 are suitably mounted on the first base frame 115 corresponding to the first mounting plate 171 and a driving rod (not shown) is suitably connected to a lower part of first mounting plate 171.

Preferably, the first elevating cylinders 183 drive the driving rod (not shown) up and down so that the first mounting plate 171 moves up and down.

In further preferred embodiments of the invention, a second cart positioning unit 220, for example as shown in FIG. 6, is suitably disposed to the moving cart return line 210 for arranging the moving cart 3, and the second cart positioning unit 220 preferably includes a second base frame 211 suitably disposed along the X direction, a return rail 213 parallel with the second base frame 211.

Preferably, the second cart positioning unit 220 suitably arranges the moving cart 3, which is transported from the storage 410 to the moving cart return line 210 and from the moving cart return line 210 to the storage 410.

Preferably, the second cart positioning unit 220 is suitably disposed to the second base frame 211 correspond to the storage 410.

A second cart positioning unit 220, according to certain preferred embodiments of the present invention, is described in Korean application No. 2008-0029864, incorporated by reference in its entirety herein.

According to preferred embodiments of the present invention, a third stopping unit 230 is suitably disposed to the moving cart return line 210 corresponding to the storage 410 for limiting X direction movement of the moving cart 3.

Preferably, the third stopping unit 230 is suitably mounted to the second base frame 211 of the moving cart return line 210 and a stopper 231 for limiting X direction movement of the moving cart 3 by operation of an operating cylinder is disposed to the third stopping unit 230.

Preferably, a second moving unit 240 is suitably disposed to the moving cart return line 210 for transporting the moving cart 3 to the X (−) direction.

Preferably, the second moving unit 240 is suitably mounted to the second base frame 211 of the moving cart return line 210 at regular intervals.

Preferably, the second moving unit 240 includes a third drive motor 241, a first gear box 243, a second roller 245 and a second power delivery shaft 247.

Preferably, the third drive motor 241 is suitably mounted to the second base frame 211 and the first gear box 243 is configured to the second base frame 211.

Preferably, the second roller 245 is suitably rotatable to the X direction and connected to the first gear box 243.

According to further preferred embodiments of the present invention, the second power delivery shaft 247 suitably connects the third drive motor 241 and the first gear boxes 243, and the second power delivery shaft 247 suitably receives driving torque of the third drive motor 241 and supplies to the second roller 245 through the first gear boxes 243.

In further related embodiments, a third moving unit 250 is suitably disposed for transporting the moving cart 3 from the storage 410 to the moving cart return line 210 along the Y(+) direction and from the moving cart return line 210 to the storage 410 along the Y(−) direction.

Preferably, the third moving unit 250 is suitably disposed to moving cart return line 210 to be preferably connected to the storage 410.

Preferably, the third moving unit 250, for example as shown in FIG. 6 and FIG. 7, includes a pair of second mounting plate 251, a third roller 253, a second guide rail 255, a second gear box 257, a third power delivery shaft 259 and a second elevating cylinders 261.

Preferably, the second mounting plate 251 is disposed between the return rails 213 of the moving cart return line 210 correspond to the storage 410.

Preferably, the third roller 253 is suitably disposed to the second mounting plate 251 rotatable to the Y direction.

Preferably, the second guide rail 255 corresponds to the cart storage 410 and is suitably disposed to the second mounting plate 251 along the Y direction.

Preferably, the second gear box 257 is suitably mounted to the second base frame 211 between the mounting plates 251.

Preferably, the third power delivery shaft 259 suitably connects the second gear box 257 and the third roller 253.

According to further preferred embodiments of the present invention, the second elevating cylinder 261 is suitably mounted to the second base frame 211 corresponding to the second mounting plate 251 and a driving rod (not shown) is suitably disposed for connecting under the second mounting plate 251.

According to further preferred embodiments, the second elevating cylinders 261 suitably drive the driving rod (not shown) up and down so that the second mounting plate 251 can suitably be moved up and down.

Preferably, the end storages 410 of the moving cart return line 210 and the first and the second traverse 310 and 320 preferably form a straight line respectively.

According to further embodiments, preferably, in the storage 410, a third base frame 411 is suitably disposed along the Y direction and a third guide rail 413 is suitably disposed parallel with the third base frame 411.

According to other further embodiments, preferably in the storage 410, for example as shown in FIG. 6 and FIG. 7, a fourth moving unit 420 is suitably disposed for transporting the moving cart 3 to the Y (+) direction.

Preferably, the fourth moving unit 420 includes a fourth drive motor 421, a third gear box 423, a fourth roller 425 and a fourth power delivery shaft 427.

Preferably, the fourth drive motor 421 is suitably mounted to the third base frame 411 and the third gear boxes 423 are suitably disposed to the third base frame 411 corresponding to the fourth drive motor 421 at regular intervals.

Preferably, the fourth roller 425 is suitably disposed to the third gear box 423 rotatable to the Y direction.

Preferably, the fourth power delivery shaft 427 suitably connects the fourth drive motor 421, the third gear boxes 423 and the second gear box 257 of the third moving unit 250.

Preferably, the fourth power delivery shaft 427 supplies driving torque of the fourth drive motor 421 to the fourth roller 425 through the third gear box 423 and also suitably supplies the driving torque to the third roller 253 through the second gear box 257 of the third moving unit 250.

Preferably, the first traverse 310, as shown in FIG. 1, is connected in a position that is suitably forward of the moving cart main line 110 and the moving cart return line 210.

In further related embodiments, through the first traverse 310, the moving cart 3 is suitably transported from the forward of the moving cart return line 210 to the moving cart main line 110 along the Y(+) direction.

Preferably, a fourth base frame 311 is suitably disposed to the first traverse 310 and a third guide rail 313 is suitably disposed parallel with the fourth base frame 311.

Preferably, the second traverse 320 suitably connects rearward of the moving cart main line 110 and the moving cart return line 210.

In certain exemplary embodiments, through the second traverse 320, the moving cart 3 is suitably transported from the rearward of the moving cart main line 110 to the moving cart return line 210 along the Y(−) direction.

Preferably, a fifth base frame 321 is suitably disposed to the second traverse 320 and a fourth guide rail 323 is suitably disposed parallel with the fifth base frame 321.

Preferably, a fifth moving unit 350, for example as shown in FIG. 8, is suitably disposed to the first and the second traverse 310 and 320 for transporting the moving cart 3 to the Y(+) direction.

According to further embodiments, the fifth moving unit 350 preferably includes a fifth drive motor 351, a second decelerator 353, a fourth gear box 355, a fifth roller 357 and the fifth power delivery shaft 359.

Preferably, the fifth drive motors 351 are suitably disposed to the fourth and the fifth base frame 311 and 321.

Preferably, the second decelerators 353 are suitably connected to the fifth drive motor 351 and mounted to the fourth and the fifth base frame 311 and 321.

Preferably, the fourth gear boxes 355 are suitably disposed to the fourth and the fifth base frame 311 and 321 along the Y direction at regular intervals.

Preferably, the fifth roller 357 is suitably disposed to the fourth gear box 355 rotatable to the Y direction.

According to other further embodiments, fifth power delivery shaft 359 connects the second decelerator 353 and the fourth gear boxes 355 and the fifth power delivery shaft 359 receives driving torque of the fifth drive motor 351 and supplies the fifth roller 357 through the second decelerator 353 and the fourth gear boxes 355.

Hereinafter, operations of the moving cart system 100 according to an exemplary embodiment of the present invention are described.

According to preferred exemplary embodiments of the present invention, the moving cart 3 may be variable in scheme according to of the type of vehicle, and in further related embodiments is circulated along the system 100 according to manufacturing rate.

In exemplary embodiments of the present invention, operations regarding one moving cart 3 are explained for convenience, however the invention is not limited as such.

In a preferred embodiment, the moving cart 3 stored in the storage 410 is suitably transported along the Y (+) direction by the operation of the fourth moving unit 420.

Preferably, the moving cart 3 transported to the moving cart return line 210 by the operation of the fourth moving unit 420 is suitably transported to the Y(+) direction by operation of the third moving unit 250.

According to further exemplary embodiments, the moving cart 3 is suitably positioned by the operation of the second cart positioning unit 220 on the moving cart return line 210 and the X(+) direction movement of the moving cart 3 is suitably limited by the third stopping unit 230.

In preferred exemplary embodiments, the moving cart 3 is suitably transported along the moving cart return line 210 to the X (−) direction by the operation of the second moving unit 240.

Preferably, in this process, the part elements 1 is loaded to the moving cart 3 and the moving cart 3 is transported to the first traverse 310.

Preferably, when the moving cart 3 reaches the first traverse 310, the moving cart 3 is transported to the Y (+) direction from the moving cart return line 210 by the operation of the third moving unit 250.

According to other further exemplary embodiments, in this process, the moving cart 3 is preferably arranged by the operation of the second cart positioning unit 220 in the moving cart return line 210 and the movement to the X(+) direction of the moving cart 3 is suitably limited by the operation of the third stopping unit 230.

Preferably, the moving cart 3 is suitably transported to the forward of the moving cart main line 110 through the first traverse 310 by the operation of the fifth moving unit 350 as shown in FIG. 8.

In further related embodiments, the moving cart 3 is suitably transported to the Y(+) direction in the moving cart main line 110 by the operation of the first moving unit 170 and is suitably arranged by the first cart positioning unit 140, and movement of the moving cart 3 to the Y(+) direction is limited by the operation of the second stopping unit 160.

Preferably, then, the moving cart 3 is transported to the X (+) direction along the moving cart main line 110 by the shuttle plate 119.

Preferably, in this process, the moving cart 3 that is suitably hooked by the hooking unit 130 is transported with the shuttle plate 119 simultaneously.

Preferably, the shuttle plate 119 receives driving torque of the shuttle driving unit 120 and suitably transports the moving cart 3 to the X (+) direction.

Preferably, the moving cart 3 transported along the X(+) direction to the process portions 511 and the movement of the moving cart 3 is suitably limited by the operation of the first stopping unit 150 as shown in FIG. 5.

According to further exemplary embodiments, in the stationary state of the moving cart 3 by the first stopping unit 150 the welding robots (not shown) preferably do spot welding processes to the part elements 1.

In further exemplary embodiments, after finishing the spot welding processes, the limiting moving cart 3 by the first stopping unit 150 is released and then the moving cart 3 is suitably transported to the rearward of the moving cart main line 110 by the shuttle plate 119.

Preferably, the moving cart 3 reaches the second traverse 320 and then the hooking of the hooking unit 130 is suitably released and the position of the moving cart 3 is arranged by the first cart positioning unit 140 and the movement of the moving cart 3 to the Y(+) direction is limited by the second stopping unit 160.

Preferably, the moving cart 3 is transported to the second traverse 320 along the Y (−) direction by the operation of the first moving unit 170 and then in the second traverse 320, for example as shown in FIG. 8, the moving cart 3 is suitably transported to the rearward of the moving cart return line 210 along the Y (−) direction by the operation of the fifth moving unit 350.

According to further exemplary embodiments, then the moving cart 3 is suitably transported to the Y (−) direction from the rearward of the moving cart return line 210 by the operation of the third moving unit 250 and arranged by the operation of the second cart positioning unit 220 and the X (+) direction movement of the moving cart 3 is suitably limited by the operation of the third stopping unit 230.

Preferably, then the moving cart 3 is transported to the X (−) direction along the moving cart return line 210 by the operation of the second moving unit 240.

Preferably, when the moving cart 3 reaches the storage 410, the position of the moving cart 3 is suitably arranged by the operation of the second cart positioning unit 220 and the movement to the X(+) direction of the moving cart 3 is suitably limited by the third stopping unit 230.

According to further preferred embodiments, the moving cart 3 is suitably transported from the moving cart return line 210 to the storage 410 by the operation of the third moving unit 250.

Preferably then, the moving cart 3 is suitably transported to the Y (−) direction by the operation of the fourth moving unit 420 and stored to the predetermined the storage 410.

Preferably, the moving cart system 100 according to exemplary embodiments of the present invention may be suitably configured on one floor for supplying and storing a moving cart 3 without a lifter, multi floors or multi moving cart storages, as compared to a conventional moving cart system.

Accordingly, in the moving cart system 100, the total equipment or the arrangement of the system can be suitably simplified or minimized and the productivity of the manufacturing facility can be suitably enhanced. Further, the requirement for investment, that is the cost required for operating the system, can be reduced.

According to further exemplary embodiments, the moving interval supplying the moving cart can be suitably reduced so that the rate of the operation of the facility can be suitably increased.

While this invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. 

1. A moving cart system comprising: a moving cart main line which is disposed along process portions and on which a moving cart is transpired along a positive length direction of the moving cart main line; a moving cart return line which is disposed parallel with the moving cart main line and on which the moving cart is transpired along a negative length direction of the moving cart return line; traverses which are disposed for connecting a frond and a rear of the moving cart main line and the moving cart return line; and a plurality of storages which are disposed perpendicular to the moving cart return line in predetermined interval along length direction of the moving cart return line for storing the moving cart, wherein the moving cart may moves along the plurality of storages.
 2. The moving cart system of claim 1, wherein: the moving cart main line is divided to end sections which is a front and a rear portion of the moving cart main line and a middle section between the end sections, and the moving cart main line comprises: a first base frame disposed along the process portions; process rails disposed both sides of the first base frame; and a shuttle plate disposed between the process rails of the middle section.
 3. The moving cart system of claim 2, wherein the moving cart system further comprising a shuttle driving unit which is disposed to the middle section of the moving cart main line.
 4. The moving cart system of claim 3, wherein the shuttle driving unit comprises: a mounting frame disposed to the first base frame; a first drive motor disposed to the mounting frame; a pinion which is connected with the first drive motor and is engaged with a rack disposed under the shuttle plate; and a plurality of guide rollers which are disposed to the mounting frame through a mounting bracket and guide the shuttle plate forward and rearward movement.
 5. The moving cart system of claim 2, the moving cart system further comprising a hooking unit which is disposed to the shuttle plate and controlling movement of the moving cart.
 6. The moving cart system of claim 5, wherein the hooking unit comprises: a hooking cylinder disposed to the shuttle plate; a hooking pin disposed to an end of a driving rod of the hooking cylinder; and a hydraulic supplier supplies hydraulic pressure to the hooking cylinder.
 7. The moving cart system of claim 1, the moving cart system further comprising: a cart positioning unit which is dispose to the moving cart main line correspond to the traverses and disposed to the moving cart return line correspond to each storage and the cart poisoning unit arranges positions of the moving cart; a first stopping unit which is mounted to the moving cart main line and limits movement of the moving cart along positive length direction of the moving cart main line; a second stopping unit which is mounted to the moving cart main line correspond to the traverses and limits movement of the moving cart along length direction of the traverses; and a third stopping unit which is mounted to the moving cart return line correspond to each storage and limits movement of the moving cart along length direction of the moving cart return line.
 8. The moving cart system of claim 2, the moving cart system further comprising a first moving unit which is disposed to the end sections of the moving cart main line and is connected with each traverses for the moving cart to be transported along length direction of the traverses.
 9. The moving cart system of claim 8, wherein the first moving unit comprises: a pair of first mounting plate disposed correspond to the traverse; at least one of the first rollers disposed to the first mounting plate to be rotated to the length direction of the traverse; a first guide rail disposed on the first mounting plate; a second drive motor disposed to the first base frame; a first decelerator disposed to the first base frame and connected to the second drive motor; a first power delivery shaft connecting the first decelerator and the first roller; and a plurality of the first elevating cylinders disposed to the first base frame correspond to the first mounting plate and including a driving rod connected to the first mounting plate.
 10. The moving cart system of claim 1, the moving cart system further comprising: a return rail disposed to a second base frame configured to the moving cart return line; and second moving units disposed along the moving cart return line for the moving cart to be transported along the moving cart return line.
 11. The moving cart system of claim 10, wherein the second moving unit comprises: a third drive motor disposed to the second base frame; a plurality of the first gear boxes arranged along the second base frame; a second roller disposed to an end of the first gear box for rotating to the length direction of the moving cart return line; and a second power delivery shaft connecting the third drive motor and the first gear boxes.
 12. The moving cart system of claim 11, the moving cart system further comprising: a third moving unit disposed to the moving cart return line to be connected with each storage for the moving cart to be transported along the length direction of the moving cart return line; and a fourth moving unit disposed to the storages for the moving cart to be transported along the storage.
 13. The moving cart system of claim 12, wherein the third moving unit comprises: a pair of the second mounting plate disposed to the moving cart return line correspond to the storage; at least one the third roller disposed on the second mounting plate for rotating along the storage direction; a second guide rail disposed to the second mounting plate correspond to the storage; a second gear box mounted to the second base frame; a third power delivery shaft connecting the second gear box and the third roller; and a second elevating cylinder disposed on the second base frame and including a driving rod connected to the second mounting plate.
 14. The moving cart system of claim 13, wherein the storage further comprising a third guide rail which is disposed to a third base frame configure to the storage for the moving cart to be transported along the storage, wherein the fourth moving unit comprises: a fourth drive motor mounted to the third base frame; a third gear box disposed to the third base frame; a fourth roller disposed for rotating along the storage length direction; and a fourth power delivery shaft connecting the fourth drive motor, the third gear box and the second gear box.
 15. The moving cart system of claim 1, wherein the front traverse further comprises a third guide rail for the moving cart to be transported from a front side of the moving cart return line to a front side of the moving cart main line, wherein the third guide rail is disposed both side of a fourth base frame configured to the front traverse.
 16. The moving cart system of claim 15, wherein the rear traverse further comprises a fourth guide rail for the moving cart to be transported from a rear side of the moving cart main line to a rear side of the moving cart return line, wherein the fourth guide rail is disposed both side of a fifth base frame configured to the rear traverse.
 17. The moving cart system of claim 16, the moving cart system further comprising a fifth moving unit which is disposed to the traverse for the moving cart to be transported along the traverse.
 18. The moving cart system of claim 17, wherein the fifth moving unit comprises: a fifth drive motor mounted to the fourth and the fifth base frame; a second decelerator disposed to the fourth and the fifth base frame and connected to the fifth drive motor; a fourth gear box connected to the second decelerator; a fifth roller disposed to the fourth gear box for rotating along length direction of the traverse; and a fifth power delivery shaft connecting the second decelerator and the fourth gear box.
 19. A moving cart system comprising: a moving cart main line; a moving cart return line; traverses; and a plurality of storages.
 20. The moving cart system of claim 19, wherein the moving cart main line is disposed along process portions.
 21. The moving cart system of claim 19, wherein the moving cart is transpired along a positive length direction of the moving cart main line.
 22. The moving cart system of claim 19, wherein the moving cart return line is disposed parallel with the moving cart main line.
 23. The moving cart system of claim 19, wherein the moving cart is transpired along a negative length direction of the moving cart return line.
 24. The moving cart system of claim 19, wherein the traverses are disposed for connecting a front and a rear of the moving cart main line and the moving cart return line.
 25. The moving cart system of claim 19, wherein the plurality of storages are disposed perpendicular to the moving cart return line.
 26. The moving cart system of claim 19, wherein the plurality of storages are disposed in predetermined intervals along the length direction of the moving cart return line for storing the moving cart.
 27. The moving cart system of claim 26, wherein the moving cart moves along the plurality of storages. 